# Learning Processing
# Daniel Shiffman
# http://www.learningprocessing.com

# Step 1: Write code that draws the following screenshots 
# with hard-coded values. (Feel free to use colors 
# instead of grayscale.)

# Step 2: Replace all of the hard-coded numbers with 
# variables.

# Step 3: Write assignment operations in draw() that 
# change the value of the variables.
# For example, “variable1 = variable1 + 2”. 
# Try different expressions and see what happens!

# Exercise 4-4a: 

def setup(): 
    size(200,200) 

def draw(): 
    background(255)
    stroke(0)
    fill(175)
    ellipse(50,50,50,50)
    ellipse(150,50,50,50)
    ellipse(50,150,50,50)
    ellipse(150,150,50,50)
